In 1996, the City of San Francisco had a vote for the residents to allow the city to build a new mall and football stadium at the Candlestick Site. It passed. Some council members fought the vote the residents approved. The 49ers got sick of waiting, and built their facilities in Santa Clara. Then they just went ahead and built Levi's Stadium at the same site. Got tired of the infighting and waiting. Kinda like the same thing going on with the A's in Oakland.